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update_site_meta( int $site_id, string $meta_key, mixed $meta_value, mixed $prev_value = '' )

Updates metadata for a site.

Description

Use the $prev_value parameter to differentiate between meta fields with the same key and site ID.

If the meta field for the site does not exist, it will be added.

Parameters

$site_id

(int) (Required) Site ID.

$meta_key

(string) (Required) Metadata key.

$meta_value

(mixed) (Required) Metadata value. Must be serializable if non-scalar.

$prev_value

(mixed) (Optional) Previous value to check before updating. If specified, only update existing metadata entries with this value. Otherwise, update all entries.

Default value: ''

Return

(int|bool) Meta ID if the key didn't exist, true on successful update, false on failure or if the value passed to the function is the same as the one that is already in the database.

Source

File: wp-includes/ms-site.php 

function update_site_meta( $site_id, $meta_key, $meta_value, $prev_value = '' ) {
	return update_metadata( 'blog', $site_id, $meta_key, $meta_value, $prev_value );
}

Uses

Uses Description
wp-includes/meta.php: update_metadata()

Updates metadata for the specified object. If no value already exists for the specified object ID and metadata key, the metadata will be added.

Used By

Used By Description
wp-admin/includes/upgrade.php: wp_upgrade()

Runs WordPress Upgrade functions.

Changelog

Version Description
5.1.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/update_site_meta